package com.lky.reggie.filter;

/**
 * @author shkstart
 * @Description
 * @date 2023-01-03-9:16
 */

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.lky.reggie.common.BaseContext;
import com.lky.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileFilter;
import java.io.IOException;

/**
 * 检查用户是否登录
 */
//@Deprecated
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    //路径匹配器，支持通配符
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();


    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;


        //1、获取本次请求的URL
        String requestURL = request.getRequestURI();// /backend/index.html

        log.info("拦截的请求：{}",requestURL);

        //定义不需要处理请求
        String [] urls=new String[]{"/employee/login","/employee/logout","/backend/**","/front/**",
                //对用户登陆操作放行
                "/common/**","/user/sendMsg","/user/login",
                "/doc.html", "/webjars/**", "/swagger-resources", "/v2/api-docs"};

        //2、判断本次请求是否需要处理
        boolean check = check(urls, requestURL);

        //3、如果不需要处理，则直接放行
        if (check)
        {
            log.info("本次请求{}不需要处理："+requestURL);
            filterChain.doFilter(request,response);
            return;
        }

        //4-1、判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("employee")!=null)
        {
            log.info("用户已登录,用户id为：{}",request.getSession().getAttribute("employee"));
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);

            long id = Thread.currentThread().getId();
            log.info("线程id为：{}",id);
            filterChain.doFilter(request,response);
            return;
        }

        //4-2、判断登录状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("user")!=null)
        {
            log.info("用户已登录,用户id为：{}",request.getSession().getAttribute("user"));
            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);

            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //5、如果未登录，则返回未登录结果,通过输出的方式向客户端页面响应数据
            response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
                return;


//      log.info("拦截到请求：{}",request.getRequestURI());
//      filterChain.doFilter(request,response);
    }

    /**
     *路径匹配，检查本次请求是否需要放行
     * @param requestURL
     * @return
     */
    public boolean check(String [] urls,String requestURL)
    {
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url,requestURL);
            if(match)
            {
                return true;
            }
        }return false;
    }
}
